CN101545801B - Calibration device for solid mass flow meter, using method and system comprising same - Google Patents
Calibration device for solid mass flow meter, using method and system comprising same Download PDFInfo
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- CN101545801B CN101545801B CN2009100508376A CN200910050837A CN101545801B CN 101545801 B CN101545801 B CN 101545801B CN 2009100508376 A CN2009100508376 A CN 2009100508376A CN 200910050837 A CN200910050837 A CN 200910050837A CN 101545801 B CN101545801 B CN 101545801B
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Abstract
The invention discloses a calibration device for a solid mass flow meter, which is characterized by comprising a weighing device special for weighing a calibrated material, a resistance component, a first pipe and a second pipe. The first pipe is arranged between an inlet of the weighing device and an outlet of the resistance component; and the second pipe is connected with an inlet of the resistance component and also provided with a pressure adjusting device. The calibration device can realize on-line and accurate calibration, remarkably improves the calibration accuracy of the solid mass flow meter, and can meet the operating requirements on calibrating the solid mass flow meter of the industries such as chemical engineering, power generation, metallurgy and the like. The invention also provides a dry feed and reaction system and a method for calibrating the solid mass flow meter.
Description
Technical field
The system that the present invention relates to a kind of calibration device for solid mass flow meter and using method and contain it.
Background technology
Pneumatic Conveying Technology claims air-flow to carry again, and it utilizes the energy of air-flow, in closed conduit along airflow direction conveying granular material.At present, Pneumatic Conveying Technology has been widely used among the commercial production such as chemical industry, generating and metallurgy.For example, adopt strength to carry the fine coal forced air bed gasification technology of dry feed to have advantages such as coal adaptability is wide, service life of equipment length, efficiency of carbon conversion height, become numerous enterprises and selected one of mainstream technology of gasifying process.But, be Dual-Phrase Distribution of Gas olid because strength is carried, situation is very complicated, and the designing and calculating of Pneumatic Conveying Technology still is in the experience stage.
In the Pneumatic Conveying Technology, the mass flowrate of solid material is important process operation parameter, and can it accurately measure the stability and safety operation that has directly influenced process units.Therefore, based on understanding, and for satisfying the operation with high pressure and the on-line measurement requirement of some technology to the solid feed physical property, researched and developed many based on different principle, can be used for the solid mass flow meter of high pressure, on-line measurement solid masses flow rate.Have based on the macroscopic property of solid in the course of conveying and electrical property; Also having needs external energy when measuring, for example adopt the solid mass flow meters such as principle of energy absorption and sound vibrations.Because in the Pneumatic Conveying Technology, Gas-solid Two-phase Flow complexity in the pipeline is under different convey materials and operating conditions, the unevenness that distributes of pipeline section solid concentration particularly, the capital influences the accurate measurement of solid mass flow meter, therefore, needs solid mass flow meter is demarcated.
There is bigger defective in the scaling method of existing solid mass flow meter, has a strong impact on the stability and safety operation of production technology.With existing industrial fine coal forced air bed gasification technology is example, the main method of at present solid mass flow meter being demarcated is by the normal pressure warehouse in its feed system the material inlet amount to be weighed, and data are demarcated the solid mass flow meter on the feeding pipe according to weighing.But the normal pressure warehouse is except as the weighing caliberating device, also bearing simultaneously and accepting from the coal mill system charging and to the function of issuance of materials jar feed.Therefore, when reaction unit was in running status, this calibration system can't carry out online weighing to feed material, must stop whole apparatus system, and off-line carries out weighing and demarcates.In addition, the weighing system range of normal pressure warehouse is bigger, and timing signal needs the long nominal time, gives to demarcate and introduces than mistake, and stated accuracy is not high, is difficult to satisfy the accurate calibration request of fine coal mass flowmeter.
For above-mentioned reasons, can't there be following problem in present industrialized gasifying powder coal device with avoiding:
One, in view of the coal complexity, particularly when gasified raw material coal source instability, communications and transportation inconvenience or because fluctuation of coal powder grinding drying system or feed coal moisture content when bigger variation takes place, the gasified raw material coal often changes.The bigger situation of raw material difference before and after even same batch coal also often occurs.And different coals is formed difference owing to its mineral matter, and its gasification performance varies, and the deviation that is difficult to estimate is brought in measurement into to solid mass flow meter.But because the defective of existing scaling method, can't demarcate solid mass flow meter accurately, can not proofread and correct because the deviation that the variation of coal brings, make that the metering of solid mass flow meter is bigger with actual defeated material amount deviation, being easy to cause because gasification temperature is low excessively causes cinder notch to block up slag, perhaps gasification temperature too high scaling loss water-cooling wall internals and gasification furnace internals force the situation of gasification installation parking maintenance.
Two, by existing scaling method solid mass flow meter is carried out timing signal, must stop whole apparatus system, off-line carries out weighing and demarcates.Production practices show that for day handling 1000～2000t coal gasification apparatus, only gasification furnace start-stop car once consumes cost just up to millions of units, says nothing of the massive losses that stopping production is caused the whole production process system.
All factors like this have greatly influenced the safety and the long-term operation of device, in view of the coal limiting factor inevitable, therefore, demand urgently developing and a kind ofly can carry out accurately the solid mass flow meter in the Pneumatic Conveying Technology at short notice, the apparatus and method of all right on-line proving, thereby the hidden danger of eliminate the effects of the act gasification installation long period, safe and stable operation.
Summary of the invention
Technical matters to be solved by this invention is can not accurately demarcate in order to overcome existing scaling method to solid mass flow meter in the Pneumatic Conveying Technology, and can not realize the defective of on-line proving, and provide a kind of new calibration device for solid mass flow meter and scaling method thereof, and a kind of dry feed of this caliberating device and the system of reaction are set.Use calibration device for solid mass flow meter of the present invention, can realize online, accurate demarcation, significantly improve the stated accuracy of solid mass flow meter, can satisfy the service requirement of industries such as chemical industry, generating, metallurgy the solid mass flow meter on-line proving.
Calibration device for solid mass flow meter of the present invention comprises that one is exclusively used in the weighing device that material is demarcated in weighing, resistance parts and one first pipeline and one second pipeline; This first pipeline is located between the outlet of the inlet of this weighing device and these resistance parts; This second pipeline links to each other with the inlet of these resistance parts, also is provided with a pressure adjustment assembly on this second pipeline.
Wherein, this weighing device that is exclusively used in weighing demarcation material only is used for unique demarcation material of accepting the required weighing of calibration process, and shows real-time weight, thereby according to these data solid mass flow meter is proofreaied and correct demarcation.Be different from existing commercial plant and demarcate the normal pressure warehouse that uses, this weighing device is not born acceptance from the coal mill system charging and to the function of issuance of materials jar feed, therefore is not subjected to the influence of other system.When being in non-calibration process, this device only has the connection effect.
Consider the sedimentation that is used for solid material for slot milling, calibration request according to different solid mass flow meters, the volume of this weighing device is preferable is 0.2～4 times of the following 1 hour material nature stacking volume of the solid mass flow meter biggest quality flow rate of being demarcated, and better is 0.4～2 times.Preferred above-mentioned volume why, be because adopt the gravimetric tank of small size capacity to substitute the gravimetric tank of large volume capacity of present industrial application as the calibration standard of weighing of solid mass flow meter, little range, high-precision weighing instrument can be set on gravimetric tank, can improve the stated accuracy of solid mass flow meter, shorten the nominal time, online and off-line calibration and realize that the quick online switching of multiple solid material lays the foundation for solid mass flow meter.
Preferably, this weighing device is a gravimetric tank.For making things convenient for industrial operation, generally under normal pressure, carry out weighing operation.Preferably, this gravimetric tank comprises gravimetric tank inlet, a gravimetric tank gas vent and gravimetric tank solid material outlet.This gravimetric tank is preferable also comprises a filtration unit; This filtration unit is connected with the gas vent of this gravimetric tank.This filtration unit is used to prevent that too much solid material from being taken out of by carrier gas, is the conventional filtration unit that uses in this area, and preferable is the cloth bag filtration unit.Preferably, this filtration unit also is connected with a dust pelletizing system, is used for removing the tiny micronic dust material of carrier gas.
Wherein, these resistance parts are the throttle part of conventional the increased Dual-Phrase Distribution of Gas olid dynamic resistance of using in this area, and preferable is orifice plate, reducer pipe or valve.When these resistance parts can make the gas-solid two-phase by this device, produce a constant pressure drop, improve the preceding pressure of resistance parts inlet duct simultaneously.Resistance parts described in the present invention, its step-down scope is preferable is pressure drop 0～5MPa between the inlet of these resistance parts and outlet.
Wherein, this pressure adjustment assembly comprises at least that preferably wherein, this pipeline making-up air device also connects a gas flow adjusting means by this second pipeline be connected with each other logical a pipeline making-up air device and a pressure monitoring device.This pipeline making-up air device and gas flow adjusting means change solid material by the change carrier gas flux and the speed of resistance parts throttle orifice is passed through in carrier gas, thereby controls resistance parts inlet duct place pressure.
Among the present invention, described solid mass flow meter is meant the instrument of measuring the solid material mass flowrate in can online demonstration process of pneumatic transmission, comprise existing by capacitance principle measure, the ray principle is measured, electrostatic principle is measured or all solid mass flow meters that need demarcate by weight method such as microwave principle measurement.
The present invention also provides the system of a kind of dry feed and reaction, and it comprises a feed system and a reaction unit, and it also comprises calibration device for solid mass flow meter of the present invention, and one or more feeding pipe, and each feeding pipe all connects a conversion equipment; Wherein, this feed system is by this feeding pipe and the corresponding conversion equipment that is connected with it, be connected with this calibration device for solid mass flow meter with this reaction unit, the outlet of the weighing device of this calibration device for solid mass flow meter is connected with the inlet of this feed system by an operation valve, and each feeding pipe all is connected with at least one solid mass flow meter.
Wherein, this one or more feeding pipe is generally 1～4 in the industrial operation of routine, and preferable is 2～4 feeding pipes.
Wherein, this conversion equipment preferably is a T-valve for realizing the device of pipe passage conversion.This T-valve tool one inlet, one first outlet and one second outlet, wherein, the inlet of this T-valve is connected with the outlet of this feed system by the feeding pipe that correspondingly connects, first outlet of this T-valve is connected with second entrance of this calibration device for solid mass flow meter, second outlet of this T-valve is connected with this reaction unit, also connects a carrier gas input media on this feeding pipe.Wherein, described T-valve is the conventional T-valve that uses in this area, has the function of turning to, and timing signal makes the issuance of materials jar be communicated with second pipeline in the caliberating device, and the issuance of materials jar is communicated with reaction unit.Wherein, second outlet of this T-valve is connected with this reaction unit, is generally by a connecting pipe and connects, and this connecting pipe can be that the porch of this reaction unit carries, and also can be the connecting pipe of independent use.
Wherein, this feed system preferably comprises a normal pressure warehouse, an intermittent blanking device and an issuance of materials jar that is linked in sequence by a pipeline and a valve successively.Wherein, the inlet of this normal pressure warehouse is the inlet of this feed system, and the outlet of this issuance of materials jar is the outlet of this feed system.Preferably, on this normal pressure warehouse, this intermittent blanking device and this issuance of materials jar carrier gas input media is housed all.As required, transport solid material in the mode that strength is carried, or be transported to reaction unit, or be transported to calibration device for solid mass flow meter of the present invention, be circulated to the issuance of materials jar.
Wherein, this normal pressure warehouse is the conventional normal pressure warehouse that uses in this area, be used to accept and store solid material from gravimetric tank or other system such as coal mill system material etc., when the issuance of materials jar needed material feeding, the solid material in the normal pressure warehouse turned back in the issuance of materials jar under the high pressure conditions by the intermittent blanking device.
Wherein, this intermittent blanking device is the conventional intermittent blanking device that uses in this area, and preferable is lock hopper system or high-pressure rotary dispenser.
Wherein, this issuance of materials jar arrives reaction unit or calibration device for solid mass flow meter of the present invention with the mode that the solid material of its storage is carried with strength by pipeline transportation under certain pressure.
The present invention also provides a kind of scaling method of solid mass flow meter, it comprises the steps: that from the feeding pipe that connects feed system and reaction unit any get the demarcation material, other adopts a weighing device that is exclusively used in weighing demarcation material that get demarcation material is weighed, according to the data of weighing, the solid mass flow meter of being demarcated on this feeding pipe is proofreaied and correct.
Wherein, the number of described feeding pipe can be for one or more.Therefore, described " any " is actual comprises two kinds of situations: when feeding pipe had only one, described " any " just was meant this feeding pipe; When feeding pipe has when a plurality of, described " any " is meant wherein any.
For making things convenient for the industrial operation process, save cost, preferable under normal pressure, the carrying out of weighing of calibration process.Simultaneously, need the control calibration process to carry out under suitable pressure, the conveying operating mode when normally moving with simulation reaction device is beneficial to the accurate demarcation of solid mass flow meter.Therefore, the preferable employing calibration device for solid mass flow meter of the present invention of scaling method of the present invention is operated.
The applicable off-line calibration of method of the present invention.Among the present invention, described off-line calibration is meant, timing signal, and no matter described feeding pipe is one or a plurality of, all not to the reaction unit feed, the feeding pipe at the solid mass flow meter place of promptly being demarcated and other feeding pipe be not to the reaction unit feed.When carrying out above-mentioned off-line calibration, preferable employing calibration device for solid mass flow meter of the present invention is operated by following: get the demarcation material by this second pipeline, the pressure of regulating this second pipeline by this pressure adjustment assembly satisfies the required pressure of solid mass flow meter timing signal afterwards; Demarcate material by after this resistance parts step-down, weigh by this weighing device of first pipeline input normal pressure.Wherein, the pressure of described this second pipeline satisfies the required pressure of flow meter calibration and is meant, in the measurement result (being the measurement result of calibrated solid mass flow meter) of under this required pressure solid mass flow meter being demarcated after finishing, compare with the measurement result of under the pressure that moves at reaction unit solid mass flow meter being demarcated after finishing, measured deviation is in ± 5% scope.Why preferably above-mentioned required pressure is because under the prerequisite that does not influence the weighing accuracy, allows to exist above-mentioned acceptable deviation, thereby reduces the complicacy and the cost of technological operation.
Except that being applicable to off-line calibration, method of the present invention also can realize on-line proving.Among the present invention, described on-line proving is meant, the number of described feeding pipe is a plurality of, timing signal, remove the feeding pipe of demarcating material of getting, the feeding pipe at the solid mass flow meter place of promptly being demarcated is not outside the reaction unit feed, and other feeding pipe continues to keep to the reaction unit feed, make and the operation that to keep reaction unit realize not stopping the on-line proving of whole apparatus system.When carrying out above-mentioned on-line proving, preferable employing calibration device for solid mass flow meter of the present invention is operated by following: get the demarcation material by this second pipeline, the pressure of regulating this second pipeline by the pressure adjustment assembly on the calibration device for solid mass flow meter of the present invention is the reaction unit operating pressure afterwards, after then get demarcation material being passed through this resistance parts step-down, weigh by this weighing device of first pipeline input normal pressure.
No matter above-mentioned off-line calibration or on-line proving, the scaling method that adopts solid mass flow meter of the present invention be at timing signal, preferable being controlled between 1MPa～6MPa of pressure of getting the material point of described feeding pipe, and preferred 2～5MPa, and keep pressure stability.Described second pipeline pressure is preferable is normal pressure to the scope of 5MPa, and that better is 1～4MPa.Described normal pressure is meant an atmospheric pressure, i.e. the gaseous tension of our usual this atmospheric envelope generation of living.
No matter above-mentioned off-line calibration or on-line proving, the inventive method can realize the demarcation path of pipeline and the conversion of forehearth by following manner: before getting the demarcation material, by changing a conversion equipment that connects the inlet of second pipeline in the inlet of feeding pipe, reaction unit and the caliberating device, corresponding feeding pipe is connected by second pipeline that is converted to in the caliberating device of the present invention that is connected with reaction unit, thereby carries out the follow-up demarcation material of getting.After demarcation is finished, regulate the pressure of the pressure of second pipeline by the pressure adjustment assembly in the caliberating device of the present invention more than or equal to reaction unit, change this conversion equipment, feeding pipe is connected by being connected to be converted to reaction unit with this second pipeline, and the input carrier gas purge in second pipeline.What wherein, described conversion equipment was preferable is aforementioned T-valve.Aforesaid way can realize demarcating the conversion of path and forehearth, certainly when off-line calibration, may therefore can not need carry out the conversion of above-mentioned path not to the reaction unit feed before or after demarcating.
In the scaling method of the present invention, after the described step of weighing, promptly after demarcation is finished, get demarcation material can be returned feed system.
Among the present invention, described solid material is the related solid material of the conventional Pneumatic Conveying Technology in this area, one or more that preferable is in fine coal, petroleum coke, living beings and the solid-state castoff.
Among the present invention, described carrier gas is the related carrier gas of the conventional Pneumatic Conveying Technology in this area, one or more that preferable is in nitrogen, carbon dioxide, water vapour and the synthetic gas.
Positive progressive effect of the present invention is: calibration device for solid mass flow meter of the present invention and scaling method, can realize online, accurate demarcation, significantly improve the stated accuracy of solid mass flow meter, can satisfy the service requirement of industries such as chemical industry, generating, metallurgy the solid mass flow meter on-line proving.
Description of drawings
Fig. 1 is the calibration device for solid mass flow meter structural drawing of a preferred embodiment of the present invention.
Fig. 2 is the structural drawing of the system of the dry feed of a preferred embodiment of the present invention and reaction.
Embodiment
Below by the mode of embodiment is further clear the present invention is described intactly, but does not therefore limit the present invention among the described scope of embodiments.
1 one kinds of calibration device for solid mass flow meter of embodiment
As depicted in figs. 1 and 2, the invention provides a kind of calibration device for solid mass flow meter 1, it comprises that mainly one is exclusively used in weighing and demarcates the weighing device 11 of material ' and resistance parts 12, and first pipeline 18 that is used to connect and second pipeline 19.Wherein, be exclusively used in weighing and demarcate the weighing device 11 of material ' only be used for unique demarcation material of accepting the required weighing of calibration process, and show real-time weight, thereby solid mass flow meter is proofreaied and correct demarcation according to these data.Therefore weighing device 11 ' do not bear acceptance be not subjected to the influence of other system from the coal mill system charging and to the function of issuance of materials jar feed.When being in non-calibration process, weighing device 11 ' only have connection effect.First pipeline 18 be located at weighing device 11 ' inlet and resistance knockdown export 122 between; Second pipeline 19 links to each other with resistance component entry 121, also is equiped with a pressure adjustment assembly 5 on second pipeline 19.Referring to Fig. 2, pressure adjustment assembly 5 comprises a pipeline making-up air device and a pressure monitoring device 15 that communicates with each other by second pipeline 19 at least.The pipeline making-up air device can be known pipeline air compensation device 13, and it can be used for make-up carrier gas flow in second pipeline 19, thus the flow velocity when improving solid material and carrier gas mixture by resistance parts 12, and then the pressure at controlled pressure monitoring device 15 places.Pipeline air compensation device 13 has the inlet 133 of the mixture inlet 131 of a solid material and carrier gas, solid material and 132, make-up carrier gass of carrier gas mixture outlet.Inlet 133 places of make-up carrier gas also are connected to a gas flow adjusting means, such as a pressure-regulating valve 14.Pressure in second pipeline 19 is regulated and is monitored by pressure monitoring device 15.The make-up carrier gas flow rate is by pressure adjustment assembly 5 Monitoring and Controlling.Pressure monitoring device 15 can be known tensimeter.Resistance parts 12 can be selected in orifice plate, reducer pipe, the throttling valve any one for use, and the potpourri that is used to make solid material and carrier gas produces a constant pressure drop during by this equipment, thereby improves the pressure at pressure monitoring device 15 places.The pressure limit at pressure monitoring device 15 places, at normal pressure to the scope of 5MPa, preferred 1MPa to 4MPa, by the pressure drop between resistance component entry 121 and the resistance knockdown export 122 is 0～5MPa, like this can simulation reaction device conveying operating mode during 2 normal operations, realize the demarcation of solid mass flow meter 17 under the high-pressure delivery state can realizing the on-line proving of solid mass flow meter 17 on the other hand on the one hand.Above-mentioned weighing device 11 ' can adopt a gravimetric tank 11 that has a weighing instrument at least, gravimetric tank 11 is provided with three passwaies, that is: be used to receive the mixture of carrying carrier gas secretly gravimetric tank inlet 111, be used to the gravimetric tank solid material outlet 113 of discharging the gravimetric tank gas vent 112 of carrier gas and being used for convey materials.In order to prevent too much solid material, such as solid fuel, to be taken out of by carrier gas, gravimetric tank 11 is also established a filtration unit, and filtration unit is connected with the gas vent 112 of gravimetric tank.Filtration unit can be known cloth bag filtration.For slot milling is used for the sedimentation of solid material, the volume of gravimetric tank 11 is under solid mass flow meter 17 biggest quality flow rates of being demarcated per hour 0.2～4 times of volume of material, preferred 0.4～2 times.
Solid mass flow meter 17 in the present embodiment be meant can online demonstration process of pneumatic transmission in the instrument of solid material mass flowrate, comprise all instrument that need demarcate by weight method such as capacitance principle measurement, the measurement of ray principle, electrostatic principle measurement.
The system of 2 one kinds of dry feeds of embodiment and reaction
As depicted in figs. 1 and 2, the present invention also provides the system of a kind of dry feed and reaction, it is mainly by a feed system 3, a reaction unit 2, a calibration device for solid mass flow meter that has gravimetric tank 11 1 as mentioned above, and one or more feeding pipe 20, each feeding pipe 20 all connects a conversion equipment; Feed system 3 is by each road feeding pipe 20 and the corresponding conversion equipment that is connected with it, be connected with calibration device for solid mass flow meter 1 with reaction unit 2 respectively, when each conversion equipment with form a feed stream after reaction unit 2 is connected, and when conversion equipment is connected with calibration device for solid mass flow meter 1, then desirable demarcation material, weigh by 11 pairs of materials of getting of gravimetric tank, thereby realize on-line proving.Each feeding pipe 20 all is connected with at least one solid mass flow meter 17.The weighing device 11 of calibration device for solid mass flow meter ' outlet be connected with the inlet of feed system 3 by an operation valve 4.Reaction unit 2 can be gasification furnace or high-pressure gasified reactor.Conversion equipment in the present embodiment is a T-valve 16, all connects a carrier gas input media G and an operation valve 4 on each feeding pipe 20.T-valve 16 has an inlet 162,1 first outlet 161 and 1 second outlet 163.The inlet 162 of T-valve is connected with the outlet of feed system 3 by the feeding pipe 20 that correspondingly connects, first outlet 161 of T-valve is connected with the inlet of second pipeline 19 of this calibration device for solid mass flow meter, second outlet 163 of T-valve is connected with reaction unit 2 by a connecting pipe, installs one or more solid mass flow meters 17 on each feeding pipe 20.Solid mass flow meter 17 in the present embodiment be meant can online demonstration process of pneumatic transmission in the instrument of solid material mass flowrate, comprise all instrument that need demarcate by weight method such as capacitance principle measurement, the measurement of ray principle, electrostatic principle measurement.
When needs on-line proving solid mass flow meter 17, feed system 3 is connected with the inlet 162 of T-valve through feeding pipe 20, first outlet 161 of T-valve is with after second pipeline 19 is connected, behind pipeline air compensation device 13, resistance parts 12 and first pipeline 18, be connected, then can pass through this solid mass flow meter 17 of weight method on-line proving with gravimetric tank inlet 111.The outlet of calibration device for solid mass flow meter, i.e. gravimetric tank outlet 113 also are that the inlet 311 of normal pressure warehouse 31 connects by the inlet of an operation valve 4 with feed system 3.Feed system 3 can be made up of the normal pressure warehouse 31, an intermittent blanking device 32 and the issuance of materials jar 33 that link to each other in proper order successively.Normal pressure warehouse 31 is used to accept and stores from gravimetric tank 11 or other charging as the solid material of coal mill system.Generally be connected with weighing instrument on the normal pressure warehouse 31, when issuance of materials jar 33 internal solid stocks are not enough, adopt as intermittent blanking devices 32 such as lock hopper system, high-pressure rotary dispensers, off and on the solid material in the normal pressure warehouse 31 is transported in the issuance of materials jar 33 under the high pressure conditions.Gravimetric tank 11 is installed in normal pressure warehouse 31 tops, is used to accept from the demarcation material of issuance of materials jar 33 and shows real-time weight, thereby solid mass flow meter 17 is demarcated.Gravimetric tank 11 is connected with normal pressure warehouse 31, is provided with operation valve 4 between gravimetric tank 11 and the normal pressure warehouse 31.Issuance of materials jar 33 is mainly used in the mode of under certain pressure the solid material of its storage being carried with strength and is transported to reaction unit 2 by feeding pipe 20.When issuance of materials jar 33 needed charging, the solid material in the normal pressure warehouse 31 can turn back in the issuance of materials jar 33 high pressure conditions under by intermittent blanking device 32, thereby formed the circulation conveying of solid material.Intermittent blanking device 32 can adopt a known lock hopper system or a high-pressure rotary dispenser.The one carrier gas input media that is used for delivery of carrier gas all is housed on normal pressure warehouse 31, intermittent blanking device 32 and the issuance of materials jar 33.
Solid material in the present embodiment can be any one or other similar solid material etc. in fine coal, petroleum coke, living beings, solid-state castoff or its potpourri.Carrier gas can be selected from nitrogen, carbon dioxide, water vapour, synthetic gas or its combination gas any one.
When demarcating solid mass flow meter 17, close the operation valve 4 between gravimetric tank 11 and the normal pressure warehouse 31; Control issuance of materials jar 33 pressure between 1MPa～6MPa, preferred 2～5MPa, and keep issuance of materials jar 33 pressure stabilitys; Adjust transportation parameters, the mode that solid material is carried by strength flows out from 33 outlets of issuance of materials jar, the potpourri of solid material and carrier gas enters conveyance conduit 20, successively by one or more solid mass flow meters 17, T-valve 16, pipeline air compensation device 13, after resistance part part 12, enter the gravimetric tank 11 of normal pressure after the decompression, carrier gas then enters dust pelletizing system through the gas vent 112 of gravimetric tank 11.When gravimetric tank 11 internal solid materials reach required semi-invariant or timing signal not, operation valve 4 is often opened and is made gravimetric tank 11 keep being communicated with normal pressure warehouse 31, and solid material enters normal pressure warehouse 31 from gravimetric tank 11, does not store solid material in the gravimetric tank 11.Be coal dust below with the transferring raw material, carrier gas is that nitrogen is example, and the system work process that specifically describes dry feed of the present invention and reaction is as follows:
Issuance of materials jar 33 communicates with gasification furnace by four fine coal outlets that connect one road feeding pipe 20 respectively on it, passes through four road feeding pipe 20A, 20B, 20C, 20D respectively to the gasification furnace feed.Four road feeding pipe 20A, 20B, 20C, 20D can be in twos be connected with gasification furnace from the side of gasification furnace opposed to each other, also can insert from the top of gasification furnace.When two solid mass flow meters 17 on the demarcation feeding pipe 20A, control issuance of materials jar 33 pressure 4.7MPa, and keep issuance of materials jar 33 pressure stabilitys.Opening controlling valve 4, the potpourri of solid material and carrier gas enters feeding pipe 20A, under the effect of carrier gas G, successively through two solid mass flow meters 17, T-valve 16, pipeline air compensation device 13, enters into normal pressure gravimetric tank 11 again after 12 decompressions of resistance parts.Pressure in 121 pipelines of resistance component entry promptly according to pipeline pressure pick-up unit P1 monitoring pressure, is regulated pressure-regulating valve 14 by pressure-regulating valve 14 controls, and controlled pressure is to demarcating desired value.When need not timing signal, to open with the solid material of gravimetric tank 11 bottoms and export 113 operation valves that are connected 4, solid material flows in the normal pressure warehouse 31.When issuance of materials jar 33 internal solid stocks are not enough, off and on the solid materials in the normal pressure warehouse 31 are transported in the issuance of materials jar 33 under the high pressure conditions by lock hopper.
When gasification furnace is in running status, can carry out on-line proving to the solid mass flow meter 17 on the way of appointing among four road feeding pipe 20A, 20B, 20C, the 20D.Needing to stop the feed of the feeding pipe 20 of demarcation, this road feeding pipe is communicated with gravimetric tank 11, keep gasification furnace to be in the safe operation state simultaneously by T-valve 16 to gasification furnace.After demarcating end, after the pressure at controlled pressure monitoring device 15 places is slightly larger than the gasification furnace internal pressure, by T-valve 16 feed system 3 is communicated with gasification furnace, the potpourri of solid material and carrier gas enters gasification furnace by a connecting pipe.Simultaneously, unlatching carrier gas F is used for feeding pipe 20 purgings when conveying stops.Thus, finished the on-line proving process of solid mass flow meter 17.
The present invention is by being provided with resistance parts 12 on the conveyance conduit 20 of gravimetric tank inlet 111, improve the mode of the flow velocity of resistance parts 12 gas-solid two-phase mixtures of flowing through, increase the pressure drop at resistance parts 12 two ends, thereby improve the pressure in second pipeline 19 before the resistance component entry 121, form solid mass flow meter 17 declared working conditions under the high pressure, provide the basis for accurately demarcating.Under the effect of resistance parts 12, the port pressure of T-valve first outlet 161 can be increased to reaction unit 2 pressure, and this just directly switches to high pressure reaction assembly 2 from gravimetric tank 11 for solid material by T-valve 16, such as high-pressure gasified stove, condition is provided, thereby has realized online accurate demarcation.In addition, the present invention is provided with little range, high-precision weighing instrument on the gravimetric tank 11 of low capacity, can improve the stated accuracy of solid mass flow meter 17, shorten the nominal time, online and off-line calibration and realize that the quick online switching of multiple solid material lays the foundation for the fine coal mass flowrate.When the present invention adopts two-way or the above conveyance conduit 20 of two-way to be reaction unit 2 feed, can be according to demarcating needs, by the T-valve 16 on arbitrary road feeding pipe 20 issuance of materials jar 33 is communicated with gravimetric tank 11, solid mass flow meter 17 is demarcated, kept the operation of reaction unit 2 simultaneously.After demarcating end, feed system 3 is communicated with reaction unit 2 through T-valve 16 by feeding pipe 20, makes solid material enter reaction unit 2.
The scaling method of embodiment 3 solid mass flow meters
Use as described in example 2 above dry feed and the system of reaction, in fine coal forced air course of conveying, solid mass flow meter 17 on the feeding pipe 20A is wherein demarcated, feeding pipe 20B, 20C and 20D continue to reaction unit charging 2 simultaneously, and reaction unit 2 and feed system 2 are kept running status.Wherein, transferring raw material is a coal dust, and carrier gas is a nitrogen.
Its step comprises:
(1) connects the T-valve 16 of the inlet of second pipeline 19 in the inlet of feeding pipe 20A, reaction unit 2 and the caliberating device 1 by conversion, feeding pipe 20A is connected by being connected with reaction unit 2 to be converted to this second pipeline 19;
(2) get the demarcation material from feeding pipe 20A;
(3) by pipeline pressure pick-up unit P1 monitoring pressure, the pressure of regulating second pipeline 19 by this pressure adjustment assembly 5 is 5MPa; The pressure of getting the material point of feeding pipe 20A is 6MPa; Wherein, the pressure of reaction unit 2 is 5MPa;
(4) demarcate material then by pressure adjustment assembly 5, first pipeline 18 and resistance parts 12, the weighing device 11 that enters normal pressure is weighed;
(5) according to weighing data, the solid mass flow meter of being demarcated 17 is proofreaied and correct;
(6) then, open caliberating device outlet valve 4, get demarcation material is returned feed system 3;
(7) regulate the pressure 6MPa that gets the material point of feeding pipe, and the pressure of regulating second pipeline 19 by this pressure adjustment assembly 5 is 5.2MPa, the pressure of reaction unit 2 is 5MPa; Change this T-valve 16, feeding pipe 20A is connected by being connected to be converted to reaction unit 2 with this second pipeline 19, and input carrier gas F purges in second pipeline 19.
The scaling method of embodiment 4 solid mass flow meters
Use as described in example 2 above dry feed and the system of reaction, in fine coal forced air course of conveying, solid mass flow meter 17 on the feeding pipe 20A is wherein demarcated, feeding pipe 20B, 20C and 20D continue to reaction unit 2 chargings simultaneously, and reaction unit 2 and feed system 2 are kept running status.Wherein, transferring raw material is a coal dust, and carrier gas is a carbon dioxide.
Its step comprises:
(1) connects the T-valve 16 of the inlet of second pipeline 19 in the inlet of feeding pipe 20A, reaction unit 2 and the caliberating device 1 by conversion, feeding pipe 20A is connected by being connected with reaction unit 2 to be converted to this second pipeline 19;
(2) get the demarcation material from feeding pipe 20A;
(3) by pipeline pressure pick-up unit P1 monitoring pressure, the pressure of regulating second pipeline 19 by this pressure adjustment assembly 5 is normal pressure 0.1MPa; The pressure of getting the material point of feeding pipe 20A is 1MPa; Wherein, the pressure of reaction unit 2 is normal pressure 0.1MPa;
(4) demarcate material then by pressure adjustment assembly 5, first pipeline 18 and resistance parts 12, the weighing device 11 that enters normal pressure is weighed;
(5) according to weighing data, the solid mass flow meter of being demarcated 17 is proofreaied and correct;
(6) then, open caliberating device outlet valve 4, get demarcation material is returned feed system 3;
(7) then, regulate the pressure 3MPa that gets the material point of feeding pipe, and the pressure of regulating second pipeline 19 by this pressure adjustment assembly 5 is 3MPa, the pressure of reaction unit 2 is 3MPa; Change this T-valve 16, feeding pipe 20A is connected by being connected to be converted to reaction unit 2 with this second pipeline 19, and input carrier gas F purges in second pipeline 19.
The scaling method of embodiment 5 solid mass flow meters
Use as described in example 2 above dry feed and the system of reaction, be used for the fine coal forced air and carry.Feeding pipe 20A, 20B, 20C and 20D stop to reaction unit 2 chargings, and reaction unit 2 is out of service, and the solid mass flow meter 17 on the feeding pipe 20A is wherein demarcated.Wherein, transferring raw material is a coal dust, and carrier gas is a nitrogen.
Its step comprises:
(1) gets the demarcation material from feeding pipe 20A;
(2) by pipeline pressure pick-up unit P1 monitoring pressure, the pressure of regulating second pipeline 19 by this pressure adjustment assembly 5 is 2MPa; The pressure of getting the material point of feeding pipe 20A is 3MPa; Pressure during reaction unit 2 operations is 2MPa;
(3) demarcate material then by pressure adjustment assembly 5, first pipeline 18 and resistance parts 12, enter weighing device 11, read the quality of the material of getting in the gravimetric tank in real time;
(4) according to weighing data, the solid mass flow meter of being demarcated 17 is proofreaied and correct.
(5) open caliberating device outlet valve 4, get demarcation material is returned feed system 3.
The scaling method of embodiment 6 solid mass flow meters
Use as described in example 2 above dry feed and the system of reaction, be used for the fine coal forced air and carry.Feeding pipe 20A, 20B, 20C and 20D stop to reaction unit 2 chargings, and reaction unit 2 is out of service, and the solid mass flow meter 17 on the feeding pipe 20A is wherein demarcated.Wherein, transferring raw material is a coal dust, and carrier gas is a nitrogen.
Its step comprises:
(1) gets the demarcation material from feeding pipe 20A;
(2) by pipeline pressure pick-up unit P1 monitoring pressure, the pressure of regulating second pipeline 19 by this pressure adjustment assembly 5 is normal pressure 1MPa; The pressure of getting the material point of feeding pipe 20A is 3MPa; Pressure during reaction unit 2 operations is 2MPa;
(3) demarcate material then by pressure adjustment assembly 5, first pipeline 18 and resistance parts 12, enter weighing device 11, read the quality of the material of getting in the gravimetric tank in real time;
(4) according to weighing data, the solid mass flow meter of being demarcated 17 is proofreaied and correct.The measurement result deviation of the solid mass flow meter after the measurement result of the solid mass flow meter after the correction and embodiment 5 proofread and correct is ± 5%.
(5) open caliberating device outlet valve 4, get demarcation material is returned feed system 3.
Claims (21)
1. calibration device for solid mass flow meter is characterized in that: it comprises that one is exclusively used in the weighing device that material is demarcated in weighing, resistance parts and one first pipeline and one second pipeline; This first pipeline is located between the outlet of the inlet of this weighing device and these resistance parts; This second pipeline links to each other with the inlet of these resistance parts, also is provided with a pressure adjustment assembly on this second pipeline; Wherein, this pressure adjustment assembly comprises that at least wherein, this pipeline making-up air device also connects a gas flow adjusting means by this second pipeline be connected with each other logical a pipeline making-up air device and a pressure monitoring device.
2. calibration device for solid mass flow meter as claimed in claim 1 is characterized in that: the volume of this weighing device be the following 1 hour material nature stacking volume of the solid mass flow meter biggest quality flow rate of being demarcated 0.2-4 doubly.
3. calibration device for solid mass flow meter as claimed in claim 2 is characterized in that: the volume of this weighing device be the following 1 hour material nature stacking volume of the solid mass flow meter biggest quality flow rate of being demarcated 0.4-2 doubly.
4. calibration device for solid mass flow meter as claimed in claim 2 is characterized in that: this weighing device is a gravimetric tank, and this gravimetric tank also comprises a filtration unit; This gravimetric tank comprises gravimetric tank inlet, a gravimetric tank gas vent and gravimetric tank solid material outlet, and this filtration unit is connected with the gas vent of this gravimetric tank.
5. calibration device for solid mass flow meter as claimed in claim 1 is characterized in that: the pressure drop between the inlet of these resistance parts and outlet is 0～5MPa.
6. calibration device for solid mass flow meter as claimed in claim 1 is characterized in that: these resistance parts are any one in orifice plate, reducer pipe, the throttling valve.
7. the system of dry feed and reaction, it comprises a feed system and a reaction unit, it is characterized in that: it also comprises just like each described calibration device for solid mass flow meter in the claim 1～6, and one or more feeding pipe, and each feeding pipe all connects a conversion equipment; Wherein, this feed system is by this feeding pipe and the corresponding conversion equipment that is connected with it, be connected with this calibration device for solid mass flow meter with this reaction unit respectively, the solid material outlet of the weighing device of this calibration device for solid mass flow meter is connected with the inlet of this feed system by an operation valve, and each feeding pipe all is connected with at least one solid mass flow meter.
8. the system of dry feed as claimed in claim 7 and reaction, it is characterized in that: this conversion equipment is a T-valve, this T-valve has an inlet, one first outlet and one second outlet, wherein, the inlet of this T-valve is connected with the outlet of this feed system by the feeding pipe that correspondingly connects, first outlet of this T-valve is connected with second entrance of this calibration device for solid mass flow meter, second outlet of this T-valve is connected with this reaction unit, also connects a carrier gas input media on this feeding pipe.
9. the system of dry feed as claimed in claim 7 and reaction, it is characterized in that: this feed system comprises a normal pressure warehouse, an intermittent blanking device and an issuance of materials jar that is linked in sequence by a pipeline and a valve successively, wherein, the inlet of this normal pressure warehouse is the inlet of this feed system, and the outlet of this issuance of materials jar is the outlet of this feed system.
10. the system of dry feed as claimed in claim 9 and reaction is characterized in that: this intermittent blanking device is a lock hopper system or a high-pressure rotary dispenser.
11. the system of dry feed as claimed in claim 9 and reaction is characterized in that: on this normal pressure warehouse, this intermittent blanking device and this issuance of materials jar carrier gas input media is housed all.
12. the scaling method of a solid mass flow meter, it is characterized in that: it comprises the steps: that from the feeding pipe that connects feed system and reaction unit any get the demarcation material, other adopts a weighing device that is exclusively used in weighing demarcation material that get demarcation material is weighed, according to the data of weighing, the solid mass flow meter of being demarcated on this feeding pipe is proofreaied and correct; The number of described feeding pipe is a plurality of, timing signal, except that get demarcate material feeding pipe not to the reaction unit feed, other feeding pipe continues to keep to the reaction unit feed, adopt caliberating device as claimed in claim 1 to demarcate simultaneously: to get the demarcation material by this second pipeline by following operation, the pressure of regulating this second pipeline by this pressure adjustment assembly equals the reaction unit operating pressure afterwards, demarcate material by after this resistance parts step-down, weigh by this weighing device of first pipeline input normal pressure.
13. scaling method as claimed in claim 12, it is characterized in that: described get demarcate material before, by changing a conversion equipment that connects the inlet of second pipeline in the inlet of feeding pipe, reaction unit and the described caliberating device, feeding pipe is converted to this second pipeline by being connected with reaction unit is connected, thereby carry out the follow-up demarcation material of getting.
14. scaling method as claimed in claim 12, it is characterized in that: described getting demarcated after the material, regulate the pressure of the pressure of second pipeline by this pressure adjustment assembly more than or equal to reaction unit, the conversion equipment of the inlet of second pipeline in the inlet of conversion one connection feeding pipe, reaction unit and the described caliberating device, feeding pipe is connected by being connected to be converted to reaction unit with this second pipeline, and the input carrier gas purge in second pipeline.
15. scaling method as claimed in claim 12 is characterized in that: the pressure of getting the material point of described feeding pipe is 1-6MPa; The pressure of described second pipeline is that normal pressure is to 5MPa.
16. scaling method as claimed in claim 12 is characterized in that: after the described step of weighing, get demarcation material is returned feed system.
17. the scaling method of a solid mass flow meter, it is characterized in that: it comprises the steps: that from the feeding pipe that connects feed system and reaction unit any get the demarcation material, other adopts a weighing device that is exclusively used in weighing demarcation material that get demarcation material is weighed, according to the data of weighing, the solid mass flow meter of being demarcated on this feeding pipe is proofreaied and correct; Timing signal, described feeding pipe is not all to the reaction unit feed, adopt caliberating device as claimed in claim 1 to demarcate by following operation simultaneously: get the demarcation material by this second pipeline, the pressure of regulating this second pipeline by this pressure adjustment assembly satisfies the required pressure of solid mass flow meter timing signal afterwards; Demarcate material by after this resistance parts step-down, weigh by this weighing device of first pipeline input normal pressure; The pressure of described this second pipeline satisfies the required pressure of flow meter calibration and is meant, in the measurement result of under this required pressure solid mass flow meter being demarcated after finishing, compare with the measurement result of under the pressure that moves at reaction unit solid mass flow meter being demarcated after finishing, measured deviation is in ± 5% scope.
18. scaling method as claimed in claim 17, it is characterized in that: described get demarcate material before, by changing a conversion equipment that connects the inlet of second pipeline in the inlet of feeding pipe, reaction unit and the described caliberating device, feeding pipe is converted to this second pipeline by being connected with reaction unit is connected, thereby carry out the follow-up demarcation material of getting.
19. scaling method as claimed in claim 17, it is characterized in that: described getting demarcated after the material, regulate the pressure of the pressure of second pipeline by this pressure adjustment assembly more than or equal to reaction unit, the conversion equipment of the inlet of second pipeline in the inlet of conversion one connection feeding pipe, reaction unit and the described caliberating device, feeding pipe is connected by being connected to be converted to reaction unit with this second pipeline, and the input carrier gas purge in second pipeline.
20. scaling method as claimed in claim 17 is characterized in that: the pressure of getting the material point of described feeding pipe is 1-6MPa; The pressure of described second pipeline is that normal pressure is to 5MPa.
21. scaling method as claimed in claim 17 is characterized in that: after the described step of weighing, get demarcation material is returned feed system.
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| CN2009100508376A CN101545801B (en) | 2009-05-08 | 2009-05-08 | Calibration device for solid mass flow meter, using method and system comprising same |
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| CN2009100508376A CN101545801B (en) | 2009-05-08 | 2009-05-08 | Calibration device for solid mass flow meter, using method and system comprising same |
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| CN102478415B (en) * | 2010-11-29 | 2013-10-09 | 中核建中核燃料元件有限公司 | Uranium hexafluoride online monitoring method |
| CN102140371B (en) * | 2010-12-11 | 2013-07-10 | 水煤浆气化及煤化工国家工程研究中心 | Pulverized coal gasification device capable of measuring feeding quantity and performing on-line calibration of solid mass flow meter and on-line calibration method thereof |
| CN102128666B (en) * | 2011-02-11 | 2012-08-08 | 合肥工业大学 | Method for calibrating Coriolis mass flowmeter |
| CN105865553B (en) * | 2015-01-23 | 2022-08-30 | 北京斯威尔工业测量仪器有限公司 | Gas-solid two-phase flowmeter and flow measuring method thereof |
| CN109250504B (en) * | 2018-08-15 | 2021-08-13 | 科林能源技术(北京)有限公司 | System and method for accurately controlling dense-phase conveying of pulverized coal and quickly calibrating flow |
| CN110699123B (en) * | 2019-11-06 | 2021-01-01 | 广西华银铝业有限公司 | Safety maintenance method for atmospheric fixed bed gas producer |
| CN112945359A (en) * | 2021-03-29 | 2021-06-11 | 开封市全盛流量计衬里有限公司 | Calibration device for flow testing tool of electromagnetic flowmeter |
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